Speaker controller



FIG. 1 is a front, right perspective view of the speaker controller;

FIG. 2 is a rear, right perspective view thereof;

FIG. 3 is a rear elevation view thereof;

FIG. 4 is a top plan view thereof;

FIG. 5 is a left, elevation view thereof;

FIG. 6 is a front, elevation view thereof;

FIG. 7 is a right, elevation view thereof; and,

FIG. 8 is a bottom plan view thereof.

The broken lines showing exemplar control buttons, a stand, feet, seams, vents, and input/output connectors are for illustrative purpose only and form no part of the claimed design. 

We claim the ornamental design for a speaker controller, as shown and described. 